Vehicle brake device

Abstract

A vehicle braking device provided with a hydraulic braking device for increasing the braking operating force generated during braking operation through a booster device and for applying braking force dependent on the increase. The basic fluid pressure of the dynamic control force is applied to the wheel cylinder to generate basic hydraulic braking force on the wheel, and is used to drive the pump to generate and apply controlled fluid pressure to the wheel cylinder to generate controlled hydraulic braking force on the wheel; brake The dynamic control state detection device is used to detect the braking control state; the regenerative braking device is used to cause the electric motor to generate a regenerative braking force corresponding to the braking control state at the wheel driven by the electric motor; the change detection device is used to detect the braking control state caused by the electric motor. a change in the actual regenerative braking force actually generated by the regenerative braking device; and a braking force compensation device for generating a controlled fluid pressure by driving a pump of the hydraulic braking device so that a controlled hydraulic braking force is generated on the wheels to compensate for the attribution The lack of regenerative braking force due to changes detected by the change detection device.

Description

[0001] This application claims Japanese Patent Application No. 2004-170309 filed on June 8, 2004, Japanese Patent Application No. 2004-174401 filed on June 11, 2004, Japanese Patent Application No. 2004 filed on September 30, 2004 .2004-285676, and foreign priority of Japanese Patent Application No. 2004-367601 filed on December 20, 2004. technical field [0002] The present invention relates to a vehicle braking device in which a target regenerative braking force to be applied to a wheel depending on a braking operation state is obtained by adding a hydraulic braking force of a hydraulic braking device and a regenerative braking force of a regenerative braking device. Background technique [0003] Hitherto, as described in Japanese Unexamined Published Patent Application 2002-264975 (hereinafter referred to as Patent Document 1), there is known a vehicle hydraulic brake device which is simple in structure, inexpensive and suitable for use in electric vehicles Performs regen...

AI Technical Summary

Problems solved by technology

[0009] However, in the vehicle brake device and the vehicle brake method described in the above-mentioned Patent Document 2, the braking force of the hydraulic brake device must be changed from the point of time when the brake pedal starts to be depressed to the time when the brake pedal is depressed. work between release time points

Thus, there is no room for the regenerative braking force to work for the target vehicle braking force, which makes it impossible to actively use the regenerative braking force

This causes a problem that the regeneration efficiency (ie, the ratio of the regenerative braking force to the target vehicle braking force) is deteriorated to such an extent that the fuel efficiency of the vehicle is deteriorated

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